Revert "revert sing-box-git pkgver"

This reverts commit 06e95e9db2.

repo/sing-box-git/PKGBUILD

@@ -37,7 +37,7 @@ sha256sums=(
 
 pkgver() {
     cd "${srcdir}/${_pkgname}"
-    git describe --tags --long | sed 's/^v//;s/\([^-]*-g\)/r\1/;s/-\([^-]*\)-\([^-]*\)$/.\1.\2/;s/-//'
+    git describe --tags --long | sed -E 's/([^-]*-g)/r\1/;s/-/./g;s/^v//'
 }
 
 _tags=with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_reality_server,with_clash_api,with_acme